diff --git a/res/css/views/rooms/_MessageComposer.scss b/res/css/views/rooms/_MessageComposer.scss
index ab7d4d7b34..e6a532d072 100644
--- a/res/css/views/rooms/_MessageComposer.scss
+++ b/res/css/views/rooms/_MessageComposer.scss
@@ -38,6 +38,8 @@ limitations under the License.
     float: left;
     margin-right: 20px;
     margin-top: 5px;
+    width: 31px;
+    height: 31px;
 }
 
 .mx_MessageComposer_roomReplaced_header {